Answer - A.
The AWS Documentation mentions the following.
When you create an AWS Elastic Beanstalk environment, you can specify an Amazon Machine Image (AMI) to use instead of the standard Elastic Beanstalk AMI included in your platform configuration's solution stack.
A custom AMI can improve provisioning times when instances are launched in your environment if you need to install a lot of software that isn't included in the standard AMIs.
Using configuration files is great for configuring and customizing your environment quickly and consistently.
Applying configurations, however, can start to take a long time during environment creation and updates.
If you do a lot of server configuration in configuration files, you can reduce this time by making a custom AMI that already has the software and configuration that you need.
Options B and C are invalid since these options would not result in the least amount of time for setting up the environment.
Option D is invalid since the metadata data section is used for getting information about the underlying instances.
For more information on working with custom environments, please refer to the below URL-
https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features.customenv.html
In order to provision an application using Elastic Beanstalk, there are several ways to ensure that the process is done in the least amount of time possible. However, the best approach would be to use a custom Amazon Machine Image (AMI) for the underlying instances.
Option A: Use a custom AMI for the underlying instances. This approach involves creating a custom AMI that contains the unique configuration files and software to be included in the application. This AMI can then be used to launch the underlying EC2 instances required for the Elastic Beanstalk environment. Using a custom AMI can reduce the amount of time needed to install and configure the necessary software on the instances.
Option B: Use configuration files to download and install the updates. This option involves using configuration files to download and install the updates required for the application. While this approach can work, it may take longer than using a custom AMI since the instances need to be launched and configured before the updates can be downloaded and installed.
Option C: Use the User data section for the Instances to download the updates. This approach involves using the user data section of the instances to download and install the updates required for the application. This can be done by specifying scripts or commands that will be executed when the instance launches. While this approach can work, it may take longer than using a custom AMI since the instances need to be launched and configured before the updates can be downloaded and installed.
Option D: Use the metadata data section for the Instances to download the updates. This option is not valid, as there is no such thing as a metadata data section for instances in Elastic Beanstalk.
In summary, the best approach to provision an application using Elastic Beanstalk with unique configuration files and software to include is to use a custom AMI for the underlying instances. This can save time and ensure that the application is up and running as quickly as possible.
